Benincasa explains some more details about the plan in the Crowdrise site created for the fundraiser:

I’ll arrange with Neil at his convenience to do the reading within the next year in a public setting, whether onstage or online. If it’s onstage, I’ll sell tickets and donate profits after costs to UNHCR. Regardless, I will make the event available to the general public via livestream or a lovely video you can watch later whilst weeping at the beauty of Neil Gaiman saying “avocado egg rolls.”